package com.sky.aspect;

import com.sky.anno.autoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class autoFillAspect {

    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.anno.autoFill)")
    public void autoFillPointCut() {}

    /**
     * 前置通知,在通知中进行字段的赋值
     */
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("autoFill start");
        // 获取当前操作的操作类型
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        autoFill  autoFill = methodSignature.getMethod().getAnnotation(autoFill.class);
        OperationType operationType = autoFill.value();
        // 获取实体对象
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        Object entity = args[0];
        // 准备赋值数据
        LocalDateTime now = LocalDateTime.now();
        Long userId = BaseContext.getCurrentId();
        // 根据不同类型进行赋值
        if (operationType == OperationType.INSERT) {
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                // 通过反射赋值
                setCreateTime.invoke(entity, now);
                setCreateUser.invoke(entity, userId);
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, userId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }

        }else if (operationType == OperationType.UPDATE) {
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, userId);
                log.info("{}",entity);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }


        }

    }

}
